SH7730 Datasheet, PDF (1062/1188 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7780 Series

Section 31 User Debugging Interface (H-UDI)
Pin Name Function I/O
Description
When Not
in Use
MPMD
ASE mode
(Emulation
support
mode
setting)
Input
A low level on this pin places the chip in ASE Pull up
mode, enabling use of the emulation support
mode functions.
When using an emulator such as the E10A,
fix this pin at a low level.
Notes: 1. This pin is pulled up in this LSI. When using interrupts or resets via the H-UDI or
emulator, the use of external pull-up resistors will not cause any problem.
2. When using interrupts or resets via the H-UDI or emulator, the TRST pin should be
designed so that it can be controlled independently and can be controlled to retain low
level while the RESET pin is asserted at a power-on reset.
3. When connected to a ground pin, the following problem occurs. Since the TRST pin is
pulled up within this LSI, a weak current flows when the pin is externally connected to a
ground pin. The value of the current is determined by a resistance of the pull-up MOS
for the port pin. Although this current does not affect the operation of this LSI, it
consumes unnecessary power. Pulling up the TRST pin can be disabled by the pull-
down control register (PULCR) of the pin function controller (PFC). For details, see
section 29, Pin Function Controller (PFC).
The TCK clock or the CPG of this LSI should be set to ensure that the frequency of the TCK clock
is less than the peripheral-clock frequency of this LSI.
Rev. 1.00 Sep. 19, 2007 Page 1014 of 1136
REJ09B0359-0100